JP5372638B2 - Water control body installation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a swash member installation device which securely stops the water between a joint ring and an existing fluid pipe, while smoothly moving the joint ring and facilitating the installation work. <P>SOLUTION: The swash member installation device, which connects water-tightly the swash member 42 and the existing fluid pipe P by a moving split ring R externally fitted into the existing fluid pipe P and moving in the pipe axial direction, includes a cylindrical body 10 hermetically fastened to the outer peripheral surface of the existing fluid pipe P so as to be interposed between the moving split ring R and the existing fluid pipe P. The outer peripheral surface of the cylindrical body 10 is formed in the pipe axial direction in a circumferential shape corresponding to the inner peripheral surface of the moving split ring R. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  According to the present invention, a predetermined location of an existing fluid pipe is excised in a waterless state by a tube excision means in a watertight sealed casing, and a water control body disposed on the cut surface side of the existing fluid pipe is installed at the predetermined location. The present invention relates to a water control body installation device for watertightly connecting a water control body and an existing fluid pipe by a joint ring that is fitted around the existing fluid pipe and moves in the tube axis direction.

  In a conventional water control body installation device, a predetermined portion of an existing fluid pipe is cut by a pipe cutting means, a cut piece cut off by cutting is collected, a water control body is installed at the cut portion, and a fluid is transferred by the water control body. Flow is controlled.

  In this type of water control body installation device, there is an apparatus in which a joint ring is moved in the direction of the pipe axis by a moving means after the water control body is installed and connected to the water control body (for example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-46680 (page 8, FIG. 6)

  In the water control body installation device described in Patent Document 1, for example, when the outer peripheral surface of the existing fluid pipe is flattened or when the outer peripheral surface of the existing fluid pipe is uneven due to corrosion or the like, When the joint ring is attached to the fluid pipe, the inner peripheral surface of the joint ring does not contact the outer peripheral surface of the existing fluid pipe uniformly in the circumferential direction, and the joint ring is moved in the pipe axis direction by the moving means. In addition, there is a possibility that the joint ring and the existing fluid pipe are in sliding contact with each other at a biased position, making it difficult to move the joint ring. In addition, since the inner peripheral surface of the joint ring does not uniformly contact the outer peripheral surface of the existing fluid pipe in the circumferential direction, there is a possibility that sufficient water stoppage between the joint ring and the existing fluid pipe cannot be secured. .

  The present invention has been made paying attention to such problems, and facilitates the installation work by smoothly moving the joint ring, and reliably stops water between the joint ring and the existing fluid pipe. It aims at providing the water control body installation apparatus which can do.

In order to solve the above-mentioned problem, the water control body installation device of the present invention includes:
In a watertight sealed housing, a predetermined location of the existing fluid pipe is excised in a continuous water state by a tube excision means, and a water control body disposed on the cut surface side of the existing fluid pipe is installed at the predetermined location, and A water control body installation device for watertightly connecting between the water control body and the existing fluid pipe by a joint ring that is externally fitted to the existing fluid pipe and moves in the direction of the pipe axis,
A cylindrical body fixed in a sealed manner on the outer peripheral surface of the existing fluid pipe so as to be interposed between the joint ring and the existing fluid pipe,
The outer peripheral surface of the cylindrical body is characterized by being formed along the tube axis direction in a peripheral surface shape corresponding to the inner peripheral surface of the joint ring.
According to this feature, the outer peripheral surface of the cylindrical body is formed along the pipe axis direction in a peripheral surface shape corresponding to the inner peripheral surface of the joint ring, so that the joint ring is formed on the outer peripheral surface of the existing fluid pipe. Regardless of its shape and state, it can be easily moved with respect to the cylindrical body, and installation work of the joint ring can be facilitated. Moreover, since the outer peripheral surface of the cylindrical body corresponds to the inner peripheral surface of the joint ring, water can be reliably stopped between the joint ring and the existing fluid pipe.

The water control body installation device of the present invention comprises:
On the inner peripheral surface of the cylindrical body, a contact portion that contacts the outer peripheral surface of the existing fluid pipe is provided along the circumferential direction of the cylindrical body, and the corresponding contact section is an outer periphery of the existing fluid pipe. Considering the shape of the surface, the radial thickness is different in the circumferential direction.
According to this feature, the outer circumferential surface of the tubular body corresponds to the inner circumferential surface of the joint ring by the radial thickness of the contact portion being different in the circumferential direction in consideration of the shape of the outer circumferential surface of the existing fluid pipe. It is possible to stably maintain the peripheral surface shape.

The water control body installation device of the present invention comprises:
On the inner peripheral surface of the cylindrical body, ribs that contact the outer peripheral surface of the existing fluid pipe are provided over the axial direction of the cylindrical body.
According to this feature, the outer peripheral surface of the cylindrical body is provided in the axial direction by providing ribs that contact the outer peripheral surface of the existing fluid pipe in the axial direction of the cylindrical body on the inner peripheral surface of the cylindrical body. A uniform peripheral surface shape can be formed, and the joint ring can be easily moved in the axial direction to a predetermined position in the cylindrical body.

The water control body installation device of the present invention comprises:
The rib is formed with a through-hole penetrating in the circumferential direction.
According to this feature, the through-hole penetrating in the circumferential direction is formed in the rib, so that a uniform fluid is provided in the circumferential direction between the outer peripheral surface of the existing fluid pipe and the inner peripheral surface of the cylindrical body. Pressure.

It is a front view which shows the state by which the existing fluid pipe was reinforced and fixed by the fixing member. It is a front view which shows the state by which the cylindrical body is attached to the existing fluid pipe | tube. It is sectional drawing which shows a cylindrical body. It is AA sectional drawing of FIG. It is a front view which shows the state which is performing the water pressure test of a cylindrical body. It is a front view which shows the state which is performing the water pressure test of a moving split wheel. It is a partial cross section figure which shows the state in which the moving member was attached to the attachment seat. It is a front view which shows the state in which the upper case is attached surrounding the existing fluid pipe | tube. It is a partial cross section figure which shows the state by which the water control valve was arrange | positioned in the cutting part. It is sectional drawing which shows the state which the bellows of the contraction state expanded in the axial direction.

  EMBODIMENT OF THE INVENTION The form for implementing the water control body installation apparatus which concerns on this invention is demonstrated below based on an Example.

  The water control body installation device according to the embodiment will be described with reference to FIGS. 1 to 10. Hereinafter, the front side in FIG. 2 will be described as the front side (front side) of the cylindrical body.

  Generally, in an existing fluid pipe that is buried in the ground and in which clean water flows inside, a predetermined portion of the existing fluid tube is excised in order to control the flow of water, and an emergency water control body is in an undisturbed state in the predetermined portion. Be placed. Such a water control body is automatically controlled in a shut-off state of the water control body in an emergency such as an earthquake. In the present embodiment, a process for installing such a water control body at a predetermined location and a water control body installation apparatus for performing the process are installed.

  Reference symbol P in FIG. 1 is a metal existing fluid pipe embedded in the soil and flowing through the inside of the soil, and has a flat shape with a slight short axis in the vertical direction due to gravity or the like. First, after cleaning the existing fluid pipe P, the existing fluid pipe P is reinforced and fixed by fixing members 101, 101 made of H steel, concrete, or the like. Next, a ruled writing means (not shown) is marked on a location where a cylindrical body to be described later is attached in the existing fluid pipe P.

  Then, as shown in FIG. 2, the cylindrical bodies 10, 10 are arranged along the circumferential direction on the outer peripheral surface of the existing fluid pipe P on the upstream side and the downstream side of the cut portion K at a predetermined location where the existing fluid pipe P is cut. Then, a cylindrical body fixing process for fixing each of them is performed.

  Here, the structure of the cylindrical body 10 will be described. The cylindrical body 10 is disposed between a moving splice wheel R (see FIG. 6) described later and an existing fluid pipe P. As shown in FIGS. 2 to 4, the cylindrical body 10 mainly includes split bodies 11, 11 ′ having two split structures each attached to an upper part and a lower part of the existing fluid pipe P, and the existing fluid pipe P. The ribs 14 and 14 'are in contact with the outer peripheral surface of the first and the contact portions 15 and 15'.

  A plurality of flange portions 12 and 12 ′ for connecting the divided bodies 11 and 11 ′ are attached to the outer peripheral surface of the divided bodies 11 and 11 ′ along the axial direction. The flange portions 12 and 12 ′. Are formed with insertion holes 12a and 12a '. Further, communication portions 13, 13, 13 'communicating with the inside are formed on the outer peripheral surfaces of the divided bodies 11, 11', respectively.

  As shown in FIG. 3, the ribs 14 and 14 ′ described above are formed on the inner peripheral surfaces of the upper portion of the divided body 11 and the lower portion of the divided body 11 ′ in the axial direction. Through holes 14a and 14a 'penetrating in the circumferential direction are formed at the center of 14'.

  Furthermore, the above-mentioned contact portions 15 and 15 'are fixed to both end faces of the divided bodies 11 and 11' along the circumferential direction of the divided bodies 11 and 11 '. As shown in FIGS. 3 and 4, the contact portions 15 and 15 ′ are substantially flush with the outer peripheral surfaces of the divided bodies 11 and 11 ′, and the inner peripheral surfaces are divided with the divided bodies 11 and 11 ′. It is formed so as to bulge in the inner diameter direction from the inner peripheral surface of 11 ′. More specifically, the inner peripheral surface of the contact portion 15 gradually decreases in thickness in the radial direction from the central portion 15a that contacts the upper end portion of the outer peripheral surface of the existing fluid pipe P toward both end portions 15b and 15b. It is formed as follows. Similarly, the inner peripheral surface of the contact portion 15 ′ gradually decreases in thickness in the radial direction from the central portion 15a ′ that contacts the lower end portion of the outer peripheral surface of the existing fluid pipe P toward both end portions 15b ′ and 15b ′. It is formed to become. That is, the contact portions 15 and 15 are formed to contact the flat shape of the existing fluid pipe P over the circumferential direction.

  The cylindrical body 10 is fixed to the flat outer peripheral surface of the existing fluid pipe P in the circumferential direction, so that the outer peripheral surface of the cylindrical body 10 is provided with the ribs 14 and 14 provided on the aforementioned divided bodies 11 and 11 ′. By “and the contact portions 15, 15”, a perfect circle shape corresponding to the inner peripheral surface of the moving split wheels R, R (see FIG. 6) described later is formed along the tube axis direction. .

  Next, the cylindrical body fixing step will be described. As shown in FIG. 2, the divided bodies 11, 11 ′ are attached to the outer periphery of the existing fluid pipe P, and the insertion holes 12a, 12a ′ ( Bolts and nuts 18 are attached to (see FIG. 3), and the divided bodies 11, 11 ′ are temporarily fixed.

  Next, a plurality of reinforcing plates 17 are welded along the axial direction of the tubular body 10 on the outer peripheral surfaces of the divided bodies 11 and 11 ′. Then, the cylindrical body 10 is centered so that the outer peripheral surface of the cylindrical body 10 has a peripheral surface shape corresponding to an inner peripheral surface of a moving split wheel R (see FIG. 6) described later, that is, a perfect circle shape. I do. In this embodiment, after the plurality of reinforcing plates 17 are welded along the axial direction of the cylindrical body 10, the cylindrical body 10 is centered. The cylindrical body 10 may be centered by simply attaching the bolts and nuts 18 to the flange portions 12 and 12 ′ without using them.

  And while welding the edge parts of the division bodies 11 and 11 ', the contact parts 15 and 15' which comprise the both ends of the axial direction of the cylindrical body 10 are welded to the existing fluid pipe P, and it is cylindrical. The body 10 is fixed to the outer peripheral surface of the existing fluid pipe P in a sealed manner. After this welding, the reinforcing plate 17 and the flange portions 12 and 12 'are melted, and then the melted portion is scraped off by a grinder (not shown).

  As described above, the existing fluid pipe P is flattened due to gravity, but the contact portions 15 and 15 ′ extend from the central portions 15a and 15a ′ to the end portions 15b, 15b, 15b ′ and 15b ′. On the other hand, the thickness in the radial direction is formed so as to gradually decrease in the circumferential direction. That is, the outer circumferential surface of the cylindrical body 10 is stable in a perfect circular shape by the radial thickness of the contact portions 15 and 15 ′ being different in the circumferential direction in consideration of the shape of the outer circumferential surface of the existing fluid pipe P. Can be maintained.

  And after fixing the cylindrical bodies 10 and 10 to the outer peripheral surface of the existing fluid pipe | tube P, as shown in FIG. 5, the water pressure test of the cylindrical bodies 10 and 10 is performed. In the water pressure test, a sink plug (not shown) is attached to one communicating portion 13 of the divided body 11 and a communicating portion 13 ′ of the divided body 11 ′, and a water pressure gauge 9 is attached to the other communicating portion 13 of the divided body 11, A predetermined water pressure is applied to the cylindrical bodies 10 and 10 to confirm the presence or absence of water leakage.

  As described above, the ribs 14 and 14 ′ that are in contact with the outer peripheral surface of the existing fluid pipe P are formed on the inner peripheral surface of the upper portion of the divided body 11 and the lower portion of the divided body 11 in the axial direction. Since the through-holes 14a and 14a 'penetrating in the circumferential direction are formed in the central portion of the ribs 14 and 14', the gap between the outer peripheral surface of the existing fluid pipe P and the inner peripheral surface of the cylindrical body is formed. The fluid pressure can be uniform over the circumferential direction. Therefore, in the water pressure test, a uniform water pressure can be applied across the circumferential direction between the outer peripheral surface of the existing fluid pipe P and the inner peripheral surface of the cylindrical body.

  In this water pressure test, it is confirmed that the water pressure gauge 9 shows a predetermined pressure value, that is, after confirming that there is no water leakage from the tubular bodies 10, 10, the water pressure gauge 9 is removed and one of the divided bodies 11 is removed. The sunk plugs are respectively removed from the communicating portion 13 and the communicating portion 13 ′ of the divided body 11 ′ and drained. In addition, after draining, the sinking plug is attached to the communication portion 13 ′, and a filler for rust prevention is injected from one communication portion 13, and the outer peripheral surface of the existing fluid pipe P and the inner peripheral surface of the cylindrical body 10 You may rust prevention between. As described above, since the through holes 14a and 14a ′ are formed at the center of the ribs 14 and 14 ′, the entire area is between the outer peripheral surface of the existing fluid pipe P and the inner peripheral surface of the cylindrical body 10. It is possible to fill the filler throughout.

  And after attaching the said sunk plug to the other communication part 13 which removed the one communication part 13 of the division body 11 and the water pressure gauge 9, respectively, as FIG. 6 shows, the outer peripheral surface of the cylindrical bodies 10 and 10 In addition, the movable split rings R, R having a split ring structure as a joint ring are respectively attached along the circumferential direction.

  Packing Re (refer to FIG. 10) is disposed on the inner peripheral surface of the movable split wheels R, R, and the movable split wheel R is cut off by a water control valve 42 as a water control body as will be described later. After being installed in the part K, the water control valve 42 and the existing fluid pipe P are installed in a watertight manner. In addition, in order to move the moving split wheels R and R in the direction of the tube axis of the cylindrical bodies 10 and 10 with lubrication by means of hydraulic movement, which will be described later, a lubricant is previously applied to the packing Re and the outer peripheral surfaces of the cylindrical bodies 10 and 10. Is applied (see FIG. 9).

  And after attaching the moving split wheels R and R to the outer surface of the cylindrical bodies 10 and 10 along the circumferential direction, respectively, the water pressure test of the moving split wheels R and R is performed. In the water pressure test, each push wheel S, S having a two-split structure for water pressure test is attached to the moving split wheels R, R via a packing (not shown) between the moving split wheels R, R. The inside of the rings R, R is sealed, and a water pressure gauge 9 is attached to the moving split wheels R, R, a predetermined water pressure is applied to the moving split wheels R, R, and the presence or absence of water leakage is confirmed.

  After confirming that there is no water leak in this water pressure test, after removing the water pressure gauge 9 and attaching a sinking plug (not shown) to the position where the water pressure gauge 9 was removed, as shown in FIG. A mounting seat Rc for mounting a moving member 64 (to be described later) constituting the hydraulic pressure moving means is attached to flanges Rb, Rb formed at one end of R, R with bolts or the like.

  Next, a housing surrounding process is performed in which the existing fluid pipe P is surrounded in a watertight manner using the housing 2. Here, the structure of the housing 2 will be described. As shown in FIG. 9, the housing 2 has a divided structure and surrounds the existing fluid pipe P in a watertight manner. The housing 2 mainly includes an upper case 2d and a lower case 2e having a two-part structure, and an on-off valve (not shown) attached to the upper case 2d.

  As shown in FIG. 9, the upper case 2d surrounds the existing fluid pipe P along the outer peripheral surface by the lower case 2e. As shown in FIG. It comes to be supported by.

  Further, as shown in FIG. 9, hydraulic movement means are provided in the side openings of the upper case 2 d and the lower case 2 e at four locations on one side (eight locations on both sides) near the outer surface of the existing fluid pipe P, respectively. A rod guide L having an inner diameter that is substantially the same as the outer diameter of the extension rod 66 that is formed extends in the tube axis direction toward the inside of the housing 2.

  Next, the casing surrounding process will be described. As shown in FIG. 7, first, the inner peripheral surface of the lower case 2e of the casing 2 is an upper guide 4a (see FIG. 8) constituting the tube excision device 1 described later. The lower case 2e and the lower guide are arranged so as to surround the outer peripheral surface on the lower side of the existing fluid pipe P by a suspension means (not shown) in a state in which the lower guide (not shown) to which the second fluid pipe P is assembled is supported. The lower case 2e is supported by the jack 75.

  After these lower case 2e and the lower guide are disposed, packings 69, 69 for preventing water leakage outside the cylindrical body 10, push wheels Q, Q for maintaining the water tightness of the packings 69, 69, and a rubber ring 68 , 68 are arranged on the outer peripheral surfaces of the cylindrical bodies 10, 10, respectively.

  Next, the moving member 64 constituting the hydraulic moving means described above is attached to the attachment seat Rc in the lower moving connecting wheel R in the figure. Specifically, the moving member 64 mainly includes an extension rod 66 and a hydraulic jack 65, and the extension rod 66 is fitted into the rod guide L of the lower case 2e described above to be attached to the mounting seat Rc. The cylinder 65b of the hydraulic jack 65 is fixedly attached to the end face of L.

  Here, a rod 65a is accommodated in the cylinder 65b. This rod 65a is connected to the tip of the extension rod 66, and hydraulic oil is supplied into the cylinder 65b, so that the rod 65a faces the cut portion K. The extension rod 66 connected to the rod 65a moves following the rod 65a, and the moving split ring R connected to the mounting seat Rc attached to the extension rod 66 is moved to the cut portion K side. It can move toward. The hydraulic movement means is constituted by a hydraulic hose H, which will be described later, and a hydraulic unit 63 for supplying hydraulic oil in addition to the moving member 64 (see FIG. 9).

  After connecting the extension rod 66 and the hydraulic jack 65 to the mounting seat Rc on the lower side of the moving split wheel R in the figure, the tube cutting device 1 (see FIG. 8) is arranged to perform the tube cutting step.

  Here, the tube excision device 1 will be described. As shown in FIG. 8, the tube excision device 1 mainly excises the upper guide 4a having the drive shaft 7, the lower guide, and the existing fluid pipe P. The cutting tool 19 includes an upper guide 4a and a cutting unit 3 that is rotatably attached to the lower guide.

  The drive shaft 7 is rotated by driving of a drive motor (not shown). When the drive shaft 7 rotates, the excision unit 3 rotates on the outer periphery of the existing fluid pipe P, and the cutting tool 19 moves in the inner diameter direction of the existing fluid pipe P while cutting the existing fluid pipe P. Is to be disconnected.

  Next, the arrangement of the tube excision device 1 will be described. First, the upper guide 4a of the tube excision device 1 is attached to the lower guide, and the tube excision device 1 is fixed to the existing fluid pipe P. Next, the upper case 2d of the housing 2 is attached to the upper part of the lower case 2e so as to surround the upper side of the existing fluid pipe P in the drawing by the suspending means 102, and both cases 2d and 2e are fixed to the existing fluid pipe P.

  The packings 69 and 69, the push wheels Q and Q, and the rubber wheels 68 and 68 are attached to the side openings of the upper case 2d and the lower case 2e, respectively, and the side openings are sealed. Next, in the same manner as described above, the moving member 64 is attached to the mounting seat Rc of the upper moving split wheel R (see FIG. 9).

  Next, the on-off valve is attached to the upper part of the upper case 2d. Then, a long drive shaft (not shown) is exposed on the drive shaft 7 of the tube excision device 1, and the upper end of the drive long shaft extends to the outside of the housing 2 and is exposed, and the inside of the housing 2 is sealed. A drive motor (not shown) is attached to the upper end of the drive long shaft that has passed through.

  The tube cutting process will be described. The cutting tool 19 provided in the cutting unit 3 is moved to the outer peripheral surface of the existing fluid pipe P by operating the drive motor and transmitting the drive torque to the drive shaft 7 through the drive long axis. It will rotate while cutting. In the excision K, the existing fluid pipe P is cut at two cut surfaces, that is, a pipe piece (not shown) between the cut surfaces is cut off from the existing fluid pipe P.

  After the cutting of the existing fluid pipe P is finished, the drive motor connected to the drive long shaft is removed, the fixation of the tube excision device 1 and the lower case 2e is released, and the tube excision device 1 together with the tube piece Pull up and close the on-off valve. Then, the tube excision device 1 is further lifted to take out the tube piece together with the tube excision device 1.

  In addition, after taking out the said tube piece outside with the tube excision apparatus 1, the suction means which is not shown in figure is provided in the upper part of the said on-off valve, the said on-off valve is made into an open state, and the existing fluid pipe | tube near the excision surface of the excision part K Chips generated at the time of excision of P are sucked by a suction means and discharged to the outside. After the chips are discharged, the on-off valve is closed and the suction means is removed from the on-off valve.

  Subsequently, the water control body installation process which arrange | positions the water control valve 42 in the cutting part K is performed. Here, the structure of the water control valve 42 will be described. As shown in FIG. 9, the water control valve 42 is connected to the valve housing 42a having a valve body (not shown) therein, and the valve body. It has a valve shaft portion (not shown) protruding outward from the valve housing 42a. Further, rust prevention rings 41 and 41 are attached to both ends of the water control valve 42.

  Further, as shown in FIG. 10, flanges F and F arranged on the cut surfaces Z and Z side of the existing fluid pipe P are formed at both ends of the water control valve 42. A plurality of insertion holes Fa penetrating in the axial direction are formed at predetermined intervals along the circumferential direction.

  The rust prevention ring 41 is mainly made of metal and formed in a bellows cylinder shape, and is connected to the bellows 50 that can be elastically deformed and the flange F of the water control valve 42 that is formed at one end of the bellows 50. And a flange 52 formed at the other end of the bellows 50.

  In the flange 52, an insertion hole 52a coaxial with the insertion hole Rf of the flange Rb and an insertion hole 52c penetrating in the axial direction are formed at predetermined intervals along the circumferential direction. Further, an end face 52d of the flange 52 facing the moving split ring R is fixed with a rust prevention portion 47 that rusts the cut surface Z of the existing fluid pipe P, and in the flange 52 and the moving split ring R. A packing 45 that maintains water tightness between the flanges Rb is attached.

  The flange 51 has a plurality of insertion holes 51a and 51b that are coaxial with the insertion hole Fa of the flange F and are formed at predetermined intervals along the circumferential direction. A plurality of attachment members 48 each having an insertion hole 48a formed substantially coaxially with the insertion hole 51b and a plurality of insertion holes 48b formed substantially coaxially with the insertion hole 52c are attached to locations corresponding to the insertion holes 51b. It is done.

  The bolt 49 is inserted into the insertion hole 51a and the insertion hole Fa of the flange F, and the bolt 49 is fastened with the nut 44. The bolt 59 is inserted into the insertion hole 48a of the attachment member 48, the insertion hole 51b, and the insertion hole Fa of the flange F. The rust prevention ring 41 and the water control valve 42 are connected by inserting the bolt 59 and fastening the bolt 59 with the nut 58. In addition, a packing 46 that maintains watertightness between the flanges 51 and F is attached to an end surface of the flange 51 facing the flange F of the water control valve 42.

  A male screw member 53 is inserted into the insertion hole 48 b of the attachment member 48 and the insertion hole 52 c of the flange 52. Nuts 54 (nuts on the flange 52 side are not shown) are screwed into the male screw member 53 so as to sandwich the mounting member 48 and the flange 52, and the mounting member 48 and the flange in the male screw member 53 are also screwed. Nuts 55 and 55 ′ are screwed between 52.

  Further, before the water control valve 42 is disposed in the cut portion K, the nut 54 on the attachment member 48 side and the nut on the flange 52 side are fastened to the male screw member 53 with the attachment member 48 and the flange 52 interposed therebetween. Thus, the bellows 50 is in a contracted state contracted in the axial direction.

  That is, the contracted state of the bellows 50 is maintained by fastening the nut 54 and the nut on the flange side with the male screw member 53, and the contracted state is achieved by loosening the nut on the flange side. The bellows 50 is released and extends in the axial direction.

  Next, the water control body installation process will be described. First, as shown in FIG. 9, the water control valve 42 to which the rust prevention rings 41, 41 are connected is suspended by a suspension means (not shown). The water control valve 42 is lowered and arranged so that the axis of the pipe line of the water control valve 42 is substantially coaxial with the pipe axis of the existing fluid pipe P. As described above, since the bellows 50 is in the contracted state contracted in the axial direction, the flange 52 (see FIG. 10) of the rust prevention ring 41 is attached to the existing fluid pipe P when the water control valve 42 is disposed. It does not contact the cut surface Z and is slightly separated.

  After lowering the water control valve 42, a joint erection process is performed in which the movable split wheels R, R are erected on the cut surfaces Z, Z of the rust prevention rings 41, 41 and the existing fluid pipe P. The hydraulic hose H is connected between the hydraulic unit 63 and the cylinder 65b of the hydraulic jack 65, and the hydraulic unit 63 is operated to supply the hydraulic oil into the cylinder 65b. The tubular body 10 is moved in the axial direction toward the cut portion K until the flange Rb of the joint ring R comes into contact with the end face 52d of the flange 52 of the rust prevention ring 41.

  At this time, as described above, the ribs 14 and 14 ′ in contact with the outer peripheral surface of the existing fluid pipe P are provided on the inner peripheral surface of the cylindrical body 10 over the axial direction of the cylindrical body 10. Even if the outer peripheral surface of the existing fluid pipe P is flat, the outer peripheral surface of the cylindrical body 10 can be formed into a uniform circular shape over the axial direction. It is easy to move to a predetermined position in the body 10 in the axial direction. Even if the outer peripheral surface of the existing fluid pipe P is uneven due to corrosion or the like, the same effect as described above can be obtained.

  Further, when the flange Rb of the moving split ring R comes into contact with the end face 52d of the flange 52 of the rust preventive ring 41, the moving split ring R presses in the direction in which the rust preventive ring 41 is further contracted. Further shrinkage of the rust prevention ring 41 is regulated by nuts 55 and 55 ′ screwed between the mounting member 48 and the flange 52 in 53. Further, the flange Rb abuts against the packing 45 formed on the end surface 52d of the flange 52, so that the water tightness in the existing fluid pipe P is maintained.

  And the water in the housing | casing 2, ie, the upper case 2d, the lower case 2e, and the said on-off valve is drained, The said on-off valve is removed. Next, the bolt 57 is inserted into the insertion hole Rf of the moving connection wheel R and the insertion hole 52a of the rust preventive rings 41, 41, and the nut 56 is fastened to the bolt 57, so that the upper case 2d and the upper case 2d side. Various members such as members constituting hydraulic mounting means provided on the mounting seat Rc and the upper case 2d are removed.

  Next, as shown in FIG. 10, by removing the nut on the flange side from the male screw member 53, the contracted state of the bellows 50 is released, and the bellows 50 extends in the axial direction by an elastic restoring force. With the extension of the bellows 50, the moving split wheel R moves relative to the cylindrical body 10 in the axial direction (see the white arrow in the figure), and the rust preventive portion 47 abuts against the cutting surface Z, thereby cutting. The surface Z can be rust-proof over the circumferential direction.

  Next, by operating the nut 55 ′ so that the nut 55 ′ is pressed against the flange 52, the rust preventive portion 47 is pressed against the cut surface Z and the rust preventive portion 47 is reliably brought into contact with the cut surface Z.

  Next, the lower case 2e and the jack 75 are removed, and the flanges Rd, Rd of the moving split wheels R, R and the flange of a push wheel (not shown) are coupled. A shut-off device (not shown) is attached to the water control valve 42 in order to control the pipe line in a shut-off state by rotating the valve element in an emergency.

  In the present embodiment, when the water control valve 42 is arranged, as described above, the water control valve 42 is arranged so as to descend from the upper side of the housing 2 with the valve shaft portion facing in the vertical direction. However, after the water control valve 42 is arranged, the water control valve rotating step of rotating the water control valve 42 in order to attach the shut-off device that transmits the turning power to the valve shaft portion facing in the horizontal direction. Is done.

  More specifically, in the water control valve rotating step, the water control valve 42 is rotated about 90 ° in the circumferential direction with respect to the existing fluid pipe P together with the movable split wheels R, R by a water control valve rotating means (not shown). Let As described above, the outer peripheral surface of the cylindrical body 10 is formed in a perfect circle shape along the tube axis direction, so that the moving split wheels R and R are easily rotated with respect to the existing fluid pipe P. As a result, the water control valve rotating process can be performed smoothly.

  And after finishing the water control valve rotation process, the said cutoff device is attached to the valve-shaft part of the water control valve 42, and a water control body installation process is complete | finished.

  As described above, in the water control body installation device of the embodiment, the outer peripheral surface of the cylindrical body 10 corresponds to the inner peripheral surface of the moving split wheel R, that is, a perfect circle shape along the tube axis direction. Therefore, regardless of the shape or state of the outer peripheral surface of the existing fluid pipe P, the moving split wheel R can be easily moved with respect to the cylindrical body 10 and the installation work of the moving split wheel R can be performed. Can be easily. Moreover, since the outer peripheral surface of the cylindrical body 10 corresponds to the inner peripheral surface of the moving split wheel R, water can be reliably stopped between the moving split wheel R and the existing fluid pipe P.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above embodiment, the fluid flowing inside the existing fluid pipe P is clean water, but the fluid is not necessarily limited to clean water, and may be, for example, industrial water, or in a gas or gas-liquid mixed state. The present invention can also be applied to a fluid pipe through which a fluid flows.

  In the above-described embodiment, the water control valve 42 is described as a rotary valve that opens and closes the pipe line by the rotation of the valve body. However, the use and configuration of the water control valve are not limited thereto, and for example, the valve body It may be a gate valve that opens and closes a pipe line by vertical movement, a water control valve such as a branch valve, or an installed body such as a flow meter or a generator.

  In the above embodiment, the contact portions 15 and 15 'that contact the outer peripheral surface of the existing fluid pipe P are provided over the circumferential direction of the cylindrical body 10. However, the present invention is not limited to this. The contact portions may be provided so as to be scattered along the circumferential direction of the cylindrical body.

  Moreover, in the said Example, although the contact parts 15 and 15 'are respectively fixed to the both ends of the division bodies 11 and 11', it is not restricted to this, For example, it is 1 to the inner peripheral surface of a division body. Two or more contact portions may be provided.

  Moreover, in the said Example, the ribs 14 and 14 'are each formed in the axial direction at the inner peripheral surface of the upper part of the division body 11, and the lower part of the division body 11', and both end surfaces of the division bodies 11 and 11 ' Further, the abutment portions 15 and 15 ′ are cylindrical bodies 10 to which the divided bodies 11 and 11 ′ are respectively fixed in the circumferential direction. However, the present invention is not limited thereto. The peripheral surface may be a cylindrical body in which only ribs are formed in the axial direction, respectively, or only the contact portions are fixed to both end surfaces of the divided body in the circumferential direction of the divided body. It may be a cylindrical body.

1 Tube excision device (tube excision means)
2 Housing 10 Cylindrical bodies 14, 14 'Ribs 14a, 14a' Through-holes 15, 15 'Abutting portion 42 Water control valve (water control body)
K excision (predetermined location)
P Existing fluid pipe R Moving joint ring (joint ring)

Claims (4)

In a watertight sealed housing, a predetermined location of the existing fluid pipe is excised in an undisturbed state by a tube excision means, and a water control body disposed on the cut surface side of the existing fluid pipe is installed at the predetermined location, and A water control body installation device for watertightly connecting between the water control body and the existing fluid pipe by a joint ring that is externally fitted to the existing fluid pipe and moves in the direction of the pipe axis,
A cylindrical body fixed in a sealed manner on the outer peripheral surface of the existing fluid pipe so as to be interposed between the joint ring and the existing fluid pipe,
The outer circumferential surface of the cylindrical body is formed in a circumferential shape corresponding to the inner circumferential surface of the joint ring along the pipe axis direction.   On the inner peripheral surface of the cylindrical body, a contact portion that contacts the outer peripheral surface of the existing fluid pipe is provided along the circumferential direction of the cylindrical body, and the corresponding contact section is an outer periphery of the existing fluid pipe. The water control body installation device according to claim 1, wherein the thickness of the radial direction is different in the circumferential direction in consideration of the shape of the surface.   The water control body according to claim 1 or 2, wherein a rib that abuts on an outer peripheral surface of the existing fluid pipe is provided on an inner peripheral surface of the cylindrical body in an axial direction of the cylindrical body. Installation equipment.   The water control body installation device according to claim 3, wherein a through-hole penetrating in the circumferential direction is formed in the rib.

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